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The Mew card, which is part of the Genetic Apex set but comes unnumbered due to its status as an alternate art card (despite there not actually being a regular version), can only be obtained after players complete the Kanto Pokdex

To set this off, all you need to do is draw a card on an opponents turn with both pieces in play

When this card is sent to the Graveyard while equipped to a monster, select 1 card on the field, and destroy it

Mega Blaziken ex can be obtained from Mega Rising: Mega Blaziken pack in the Mega Rising set

Japan Showcase cards appear only in Collector Boosters

Any ramp deck, later game deck, and control build (particularly one in W/R) will benefit from the Tower